Boot and shoe nailing machine



(No Model.) s Sheets-Sheet 1..

. H.v S. BACON.

BOOT AND SHOE NAILING MACHINE.

N0. 355,117. Patented D60. 28, 1886.

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Jib m (No Model.) s Sheets-Sheet 2.

v H; S. BACON; BOOT AND SHOE NAILING MACHINE.

No. 355,117. Patented Dec. 28, 1886-.

i \nm i- NIL illllirlll IIIIIIIIIIIII ,IAIII mu Wrf E5512 s. W WZZM Mfi/ w (NoModeL) I s SheetsShet a. ,H. s. BACON. BOOT AND SHOE NAILINGMACHINE. No. 355,117. Patented Dec. 28, 1886.

N Prrrzasmowuma n mr, Washington, 04 c.

,7 UNITED STATES PATENT OFFICE.

HENRY S. BACON, MILFORD, MASSACHUSETTS.

BOOT AND SHOE NA|L|-NG MACHINE.

SPECIFICATION forming part of Letters Patent No. 355,117, dated December28, 1886.

Application filed January 28, 1886. Serial No. 190,009. (No model.)

To all whom, it away concern:

Be it known that I, HENRYS. BACON, of Milford, county of Worcester,State of Massachusetts, have invented certain new and use fulImprovements in Boot and Shoe Nailing Machines, of which the followingis a specification, taken in connection with the drawings accompanyingand forming a part hereof, in which Figure 1 is a front elevation of thehead of the machine provided with my improvements. Fig. 2 is a sideelevation of the same. Fig. 3v is a side elevation of the opposite sidefrom Fig. 2, with some of the parts broken away. Fig. 4 is a rear viewfrom line 00 :0, Fig. 3.- Figs. 5 and 6 are a plan and side View,respectively, of the cams which operate the awl-bar and driver. Figs. 7and 8 are rear and side views, respectively, of the awl-bar. and 10 arerear and side views of the driverbar. Fig. 11 is a plan of the ratchetand pawls which operate the feed-roll. Figs. 12 and 13 are a plan andside view, respectively, of the connecting-lever of the mechanism whichautomatically adjusts the length of the nails. Fig. 14 is a plan of thepawl and ratchet and gears which actuate the nailcar rier.

My invention is an improvement on the machine sh'own and described inLetters Patent of the United States N 0. 319,875, dated June 9, 1885,granted to me.

In an application for Letters Patent made by me and now pending in theUnited States Patent Office, I have shown an improved hornreleasingmechanism by which while the horn moves downward a given distance atevery revolution of the shaft to allow the stock to be fed forward, thepoint from which it is lowered is variable, and varies automaticallywith the thickness of the stock. In sucha machine, designed to operateon stock of a considerable thickness, the awl must have a downwardmovement of considerable length, in order to pierce whatever thicknessof stock may be put into the machine. The downward movement of the awltakes place just in front of the horn, and, in the machine referred-to,when the horn is high up, as when light or medium stock is being nailedthe awl-point-projects downward considerably below the tip of the hornand in front of it, and as the head of the ma- Figs. 9

chine is moved to feed the stock forwardwhile the awl is down and beforeit is raised sufficiently to clear the point of the horn the awl isliable to come in contact with the horn and be bent or broken, or damagethe horn. One object of my present invention is the production ofmechanism for regulating the movement of the awl, so that interferencebetween the awl and the tip of the horn may be avoided, and this featureof my invention consists of the cam mechanism, operated from the mainshaft in conjunction with the awl-bar, as is hereinafter more fullydescribed.

My invention further consists of the cam, lever, and ratchet mechanismshown and described for intermittently actuating the cylindricalnail'oarrier, which carries the nail from the cutting mechanism tothedriver; and further, my invention consists in the combined cam,lever, and stop mechanism, arranged as shown and hereinafter set forth,by which the length of nail required is automatically'regulated from thethickness of the stock on the horn.

the machine shown in the accompanying drawings, throughout which likeletters of reference indicate like parts.

A is the standard of the machine.

13 is the sliding head, which is moved by the cam-disk C (see Fig. 1)while the awl is in the stock in order to feed the stock forward. In theface of the sliding head B the awl-bar a and driver-bar b are mounted inways or grooves cut therein, to permit of their vertical reciprocatingmovement. The awl-bar a and driver I) are forced down by spiral springsa (see Fig. 1) in the well-known manner.

In order to move the awl-bar upward, a camdisk, d, (see Figs. 1, 5, and6,) is provided, which is mounted on the end of the shaft, and directlybehind the awl-bar, and arranged to act against ashoulder, f, thereon.As the cam d assumes the position shown in Fig. 1,.the

shoulder f of the awl-bar passes the point f I of the cam, and allowsthe awl to be forced downward through the work. Immediately upon itsreaching the lowest point in its downward movement the point f of thecam begins to bear against the shoulder f of the awlbar, and at onceraises it so as to bring the ICC - ward movement of the awl-bar raisesthe awl point in, but not above, the stock, and in this position thesliding head B moves toward the left, and the stock is fed forward withthe point of the awl in it. When the feed movement is completed, thepoint f of the cam d acts to raise the awl to its highest point again,when the movement is repeated. By this mechanism the awl is raised clearof the tip of the horn, but not clear of the stock on the horn, so thatwhen the head of the machine slides the stock will be fed forward- Thecamf raises the driver-bar in the well-known manner, acting inconjunction with shoulderf placed thereon.

The mechanism for operating the nail carrier is constructed as follows:D is a cam fast on the main shaft and provided with a campath, g, on itsperiphery. A lever, h, pivoted to the frame of the machine, (see Fig.2,) is provided at one end with a cam-truck, h, which acts in thecaurpath g. The other end of lever It has pivoted to it a connectingrod,'5, by which it is connected with the pawllever j, (see Fig. 14,) whichis pivoted on the arborwith the gear 70 and ratchet Id. At everyrevolution of the main shaft the pawl on lever j moves the ratchet itforward one tooth, and 1 turns the gear k, which is fast to it, acorresponding distance. The pawl of lever j is held against its ratchetk by the tension of the spiral spring 9 fast at one end to the pawl, andat the other to the lever. (See Fig. 14.) The gear is meshes with pinionk fast to the cylinder of the nail-carrier, and each movement of thegear k, caused by the forward movement of the ratchet k, actuates thepinion k and causes the nail-carrier E to revolve through one-third ofits circumference which transfers the nail, which may be cut at Z to Z,where it is driven. (See Fig. 14.)

It is necessary that the nail-carrier E, when it is revolved, be stoppedexactly at the right point, in order that the hole, which carries thenail, may come directly under the driver. To efiect this the recesses m(shown by dotted lines, Fig. 14,) are cut in the sides of thenailcarrier at such a point relative to each nailhole, respectively,that the end of the bar E, striking the end of a recess, (see Fig. 14,)will stop the nail-carrier instantly, and in exactly the properpositionto bring the nailhole under the driver.

The bar E is rigidly secured by bolts n n to the frame of the machine.It will be obvious that, instead of the recesses m, a pin may be set inthe nai1-carrier so as to project from its surface sufficiently to comein contact with bar E, and thus accomplish the same object.

After the nail is driven the sidewise feed.

movement of the head carries the nail-carrier with it and frees it fromcontact with the stopbar E. During this feed movement the gear k changesits position relatively to the stationary gear k, the latter turningloosely in mesh with the former and the movement being insufficient indistance to throw the gears out of mesh. During this movement of gear kthe pawl of leverj is raised out of the notch in the ratchet, but thenotches are sufficiently far apart (see Fig. 14) to prevent it fromdropping into the succeeding one.

I shall now describe the mechanism by which the length of nail, cut anddriven, is automatically regulated by the thickness of stock which is onthe horn. The'rod G is connected in the wellknown manner with thehorn-depressing treadle, which is not shown in the drawings, and as thehorn moves downward the rod G is moved upward. To the upper end of rod G(see'Fig. 3) is pivoted the lever H, which is provided with a slidingfulcrum at K, as will be hereinafter described. The other end of thislever is slotted, as shown at 0, Fig. 3, and in this slot is pivoted thelower end of the piece L, which is adapted to slide vertically in thestationary frame of the machine, as shown, Fig. 3, and is provided withan arm or projection, M, which proje'cts at right angles thereto. Acam-disk, N, (see Figs. 3 and 4,) is secured to the main shaft, anddirectly above it the lever P is pivoted at I? to a stud, P, on theframe. A friction-roll, p, journaled on a stud on the lever, is setdirectly over the periphery of the cam N, andis adapted to act thereon.To the other end of lever Pis pivoted the linklt, which is pivoted atits lower end to the disk R, set on the shaft S of the feed-roll. (SeeFig. 2.) On the shaft S, and close up to the opposite face of the diskR, is secured the ratchet T, see Fig. 11,) and' on this side of the diskR are pivoted three pawls, q, equidistant from each other and each actedupon by leaf-springs r to hold them against the ratchet-teeth, thesprings being secured in any convenient manner to the disk R. The pawlsq are so arranged with relation to each other and to the ratchet-teeththat while one of the pawls bears against a tooth the point of the nextpawl will lie midway of the incline of its tooth, while the third pawlwill lie very near the top of another tooth, as is shown in Fig. 11. Bythis arrangement I am enabled to use a coarser toothed ratchet than Iotherwise could, and at the same time it will be very sensitive to themovement of the pawl-disk B, so that the slightest downward movement ofthe link R will turn the ratchet T, and consequently the shaft S and itsfeedroll S. (See Fig. 1.)

The feed-wheel S is set in the sliding head of the machine and operatesin the well-known manner. The shaft S is journaled' at one end in thesliding head B, (see Fig. 2,) and at the other end in an arm, B securedto said head and projecting rearwardly therefrom. This shaft, therefore,as also the disk R and its ratchet mechanism, slides with the slidinghead B, and is permitted to do so, while at the same time it isconnected with the operatingwell-known manner.

lever P (see Fig. 4) by reason of the link connection R, which isflexible and will permit of this movement, as will be obvious.

The length of nail depends, as in many machines of this class, upon thelength of wire fed down during one movement of the feedrolls, and themovementof the feed-rolls is governed by the movement of lever P,through the chain of mechanism just described. The upward movement ofthe free end of lever P, and consequently the downward movement of thelink at the other end of the lever, is effeoted by the rotation of camN, as will be obvious. .(See Fig. 4.) When the cam N passes the pointshown in Fig. 4, it permits the free end of the lever P to drop untileither the roll p strikes the cam periphery or the projecting end of thelever P strikes the projection or stop M on the vertical piece L. If theprojection M is high up, the lever P will-drop only a short distance,and as it is raised to the same height each time by the rotation of camN it will only move upward a short distance at thenext revolution of thecam and the disk u It, and consequently the feed-roll S will be actuatedonly slightly, and consequently ashort length of wire will be fed downand a short nail produced, while if the projection M be low down thereverse will be true and a longer nail will be cut. The length of thenail, therefore, is governed by the position of the stop M, and theposition of the stop M is governed by the position of the horn throughlever H, rod G, and the horn-treadle mechanism, as has been alreadydescribed. It will be seen, therefore, that if thick stock is put on thehorn the horn will be correspondingly lowered, lowering the projection Mand causing a corresponding length of nail to be fed down.

For the purposeof adjusting the throw of lever H, and thus setting oradjusting the length of nail which it is desired to drive into thethickness of stock on the horn, a sliding fulcrum, as shown at K, Fig.3, is provided. This consists of a block adapted to slide in a slot, inthe lever H, (see Fig. 12,) and into which the pin K also passes, whichis adapted to slide in a corresponding slot in the frame. (See Fig. 3.)This latter block is actuated by an adjusting-screw, it, set in theframe in the By means of this screw the fulcrum of the lever may bechanged and finely adjusted, and in case it is desired to have the nailssufficiently long relatively to the thickness of the stock, so thattheir heads will project slightly above its surface, this may beeffected by a slight movement of the adj listing-screw 15.

What I claim is- 1. In a boot and shoe nailing machine, the combination,witha sliding head, of an awlbar movable vertically therein andhaving alifting-shoulder, as f, and a rotating cam, d, having two operatingparts, ff of different throws, whereby when the said aWl-bar has beenraised to its highest point by the part f,

and has completed its downward movement to pierce the stock, the awlwill be immediately raised above the horn, but not out of the stock, bythe part f the awl remaining in the stock until the latter has been fedby the sliding movement of the said head, substantially as set forth.

2. The combination, in a nailing-machine, of the lever h and itsoperating-cam, the connecting-rod i, lever j and its pawl and ratchetand gear, and the nail-carrier E and its actuating-pinion, substantiallyas shown and described.

3. The combination, withthe operating parts of a nailing-machineof thecylindrical nailcarrier E and its actuating mechanism and the stop-barE, for the purposes and substantially as set forth.

4. The combination,with the operating parts of a nailing-machine, of thestop M,actuated, as set forth, by the movement of the horn, and thelever P and its actuating-cam, disk R and its actuating-link, and pawland-ratchet meehanism on the shaft of the feedq'oll, whereby themovement of the feed-rolls is governed by the position of the horn, forthe purposes and substantially as set forth.

5. The combination,with the operative parts of a nailing-machine havingmechanism to automatically regulate the nail from the position of thehorn, of lever H, provided with a fulcrum set in blocks adapted to slidein slots in the lever and frame, and actuated by the adjusting-screw t,for the purposes and substantially as set forth.

HENRY S. BACON.

Witnesses:

WM. A. MACLEOD, ROLAND B. HOLDEN.

